Answer:
Step-by-step explanation:
first number = x
second number = y
x = y - 4
2y = 3x + 19
substitute x to the second equation
2y = 3(y-4) - 4
2y = 3y -16
-y = -16
y = 16
Go back to first equation
x = y - 4
x = 16 - 4
x = 12
Answer:
8.5 hours
Step-by-step explanation:
Draw a line of best fit to predict